My sister, Natalie, asked me for some main-dish dinner ideas since her two daughters are now home from college for the summer. This recipe for Flank Steak with Tomatoes and Feta is perfect for weeknights and weekends, especially since it’s grilling season (and Memorial Day is coming up). It’s so simple to prepare using fresh basil, oregano, garlic, fresh lemon juice and red wine vinegar. And who says beef isn’t healthy? Flank Steak with Tomatoes and Feta only has 185 calories, 29 grams of protein and only 2 grams of fat and carbohydrates per serving.